Prompt
Create a realistic portrait of Sir Charles Lyell, a British geologist, in a formal 19th-century setting, reflecting his profession and contributions to the field of geology, particularly his work on uniformitarianism and authorship of "Principles of Geology". Depict him in attire befitting a Baronet and Fellow of the Royal Society of his era, possibly seated with a backdrop that subtly suggests geological or natural elements, such as a faint view of a landscape or a few geological specimens. Capture his likeness with a sense of dignity and intellectual depth, as he was a significant figure in influencing Charles Darwin and advancing geological science.
